Dresden 2026 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 78: Quantum Dots and Point Contacts (joint session TT/HL)

TT 78.2: Vortrag

Donnerstag, 12. März 2026, 11:15–11:30, HSZ/0101

Lindblad-based linear response of hybrid semiconductor-superconductor devices — •Tobias Kuhn, Raffael L. Klees, and Monica Benito — Augsburg University, Augsburg, Germany

The field of hybrid semiconductor-superconductor quantum dots is pushing towards the development of functional devices that harness the advantages of both worlds. Their complexity calls for a complete theoretical framework to understand responses to different probe fields and dissipation induced by the environment. We present a Lindblad-based linear response formalism, built upon the framework introduced in Ref. [1]. It captures not only the inherently multi-level nature of these devices but also their probe-readout flexibility and non-unitary effects of the finite-frequency response. We exemplify the framework using quantum dot based Kitaev chain setups which are promising candidates for topologically protected qubits [2,3].
[1] L. Peri, M. Benito, C. J. B. Ford, and M. F. Gonzalez-Zalba, npj Quantum Inf 10, 1 (2024)
[2] M. Leijnse and K. Flensberg, Phys. Rev. B 86, 134528 (2012)
[3] D.M.Pino, R.S.Souto, R.Aguado, Phys. Rev. B109, 075101 (2024)

Keywords: hybrid semiconductor-superconductor devices; Kitaev chains; linear response; qubit readout